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On weaker forms of separability
Abstract
Two properties each of which is equivalent to separability for regular spaces and is weaker than separability in general are considered as well as the corresponding cardinal functions.
Keywords: Separable space, θ -separable space, δ -separable space, density, θ -density, δ -density, cellularity, extent, θ -closure, δ -closure
Quaestiones Mathematicae 31(2008), 387–395
Keywords: Separable space, θ -separable space, δ -separable space, density, θ -density, δ -density, cellularity, extent, θ -closure, δ -closure
Quaestiones Mathematicae 31(2008), 387–395
